package com.kuang.utils;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.LinkedList;

public class ArrayListTest {

    public static void main(String[] args) {
//        ArrayList<Object> list = new ArrayList<>();
//        list.add("1");

        HashMap<Object, Object> map = new HashMap<>();

        map.put("aa","aa");

    }
}
